QgsFeatureList QgsConvexHullAlgorithm::processFeature( const QgsFeature &feature, QgsProcessingContext &, QgsProcessingFeedback *feedback )
{
QgsFeature f = feature;
if ( f.hasGeometry() )
{
QgsGeometry outputGeometry;
if ( QgsWkbTypes::flatType( f.geometry().wkbType() ) == QgsWkbTypes::Point )
{
feedback->reportError( QObject::tr( "Cannot calculate convex hull for a single Point feature (try 'Minimum bounding geometry' algorithm instead)." ) );
f.clearGeometry();
}
else
{
outputGeometry = f.geometry().convexHull();
if ( outputGeometry.isNull() )
feedback->reportError( outputGeometry.lastError() );
f.setGeometry( outputGeometry );
}
if ( !outputGeometry.isNull() )
{
QgsAttributes attrs = f.attributes();
attrs << outputGeometry.constGet()->area()
<< outputGeometry.constGet()->perimeter();
f.setAttributes( attrs );
}
else
{
QgsAttributes attrs = f.attributes();
attrs << QVariant()
<< QVariant();
f.setAttributes( attrs );
}
}
return QgsFeatureList() << f;
}
QgsFeature QgsConvexHullAlgorithm::processFeature( const QgsFeature &feature, QgsProcessingContext &, QgsProcessingFeedback *feedback )
{
QgsFeature f = feature;
if ( f.hasGeometry() )
{
QgsGeometry outputGeometry = f.geometry().convexHull();
if ( !outputGeometry )
feedback->reportError( outputGeometry.lastError() );
f.setGeometry( outputGeometry );
if ( outputGeometry )
{
QgsAttributes attrs = f.attributes();
attrs << outputGeometry.constGet()->area()
<< outputGeometry.constGet()->perimeter();
f.setAttributes( attrs );
}
else
{
QgsAttributes attrs = f.attributes();
attrs << QVariant()
<< QVariant();
f.setAttributes( attrs );
}
}
return f;
}
bool QgsVectorLayerImport::addFeature( QgsFeature& feat )
{
QgsAttributes attrs = feat.attributes();
QgsFeature newFeat;
if ( feat.constGeometry() )
newFeat.setGeometry( *feat.constGeometry() );
newFeat.initAttributes( mAttributeCount );
for ( int i = 0; i < attrs.count(); ++i )
{
// add only mapped attributes (un-mapped ones will not be present in the
// destination layer)
int dstIdx = mOldToNewAttrIdx.value( i, -1 );
if ( dstIdx < 0 )
continue;
QgsDebugMsgLevel( QString( "moving field from pos %1 to %2" ).arg( i ).arg( dstIdx ), 3 );
newFeat.setAttribute( dstIdx, attrs.at( i ) );
}
mFeatureBuffer.append( newFeat );
if ( mFeatureBuffer.count() >= FEATURE_BUFFER_SIZE )
{
return flushBuffer();
}
return true;
}
QSizeF QgsTextDiagram::diagramSize( const QgsFeature& feature, const QgsRenderContext& c, const QgsDiagramSettings& s, const QgsDiagramInterpolationSettings& is )
{
QgsExpressionContext expressionContext = c.expressionContext();
expressionContext.setFeature( feature );
if ( feature.fields() )
expressionContext.setFields( *feature.fields() );
QVariant attrVal;
if ( is.classificationAttributeIsExpression )
{
QgsExpression* expression = getExpression( is.classificationAttributeExpression, expressionContext );
attrVal = expression->evaluate( &expressionContext );
}
else
{
attrVal = feature.attributes().at( is.classificationAttribute );
}
bool ok = false;
double val = attrVal.toDouble( &ok );
if ( !ok )
{
return QSizeF(); //zero size if attribute is missing
}
return sizeForValue( val, s, is );
}
void QgsVectorLayerFeatureIterator::useAddedFeature( const QgsFeature& src, QgsFeature& f )
{
f.setFeatureId( src.id() );
f.setValid( true );
f.setFields( &L->mUpdatedFields );
if ( src.geometry() && !( mRequest.flags() & QgsFeatureRequest::NoGeometry ) )
{
f.setGeometry( *src.geometry() );
// simplify the edited geometry using its simplifier configured
if ( mEditGeometrySimplifier )
{
QgsGeometry* geometry = f.geometry();
QGis::GeometryType geometryType = geometry->type();
if ( geometryType == QGis::Line || geometryType == QGis::Polygon ) mEditGeometrySimplifier->simplifyGeometry( geometry );
}
}
// TODO[MD]: if subset set just some attributes
f.setAttributes( src.attributes() );
if ( !mFetchJoinInfo.isEmpty() )
addJoinedAttributes( f );
}
QgsFeatureList QgsAddXYFieldsAlgorithm::processFeature( const QgsFeature &feature, QgsProcessingContext &context, QgsProcessingFeedback *feedback )
{
if ( mTransformNeedsInitialization )
{
mTransform = QgsCoordinateTransform( mSourceCrs, mCrs, context.transformContext() );
mTransformNeedsInitialization = false;
}
QVariant x;
QVariant y;
if ( feature.hasGeometry() )
{
if ( feature.geometry().isMultipart() )
throw QgsProcessingException( QObject::tr( "Multipoint features are not supported - please convert to single point features first." ) );
const QgsPointXY point = feature.geometry().asPoint();
try
{
const QgsPointXY transformed = mTransform.transform( point );
x = transformed.x();
y = transformed.y();
}
catch ( QgsCsException & )
{
feedback->reportError( QObject::tr( "Could not transform point to destination CRS" ) );
}
}
QgsFeature f = feature;
QgsAttributes attributes = f.attributes();
attributes << x << y;
f.setAttributes( attributes );
return QgsFeatureList() << f;
}
void QgsFeatureAction::onFeatureSaved( const QgsFeature& feature )
{
QgsAttributeForm* form = qobject_cast<QgsAttributeForm*>( sender() );
Q_UNUSED( form ) // only used for Q_ASSERT
Q_ASSERT( form );
// Assign provider generated values
if ( mFeature )
*mFeature = feature;
mFeatureSaved = true;
QSettings settings;
bool reuseLastValues = settings.value( "/qgis/digitizing/reuseLastValues", false ).toBool();
QgsDebugMsg( QString( "reuseLastValues: %1" ).arg( reuseLastValues ) );
if ( reuseLastValues )
{
QgsFields fields = mLayer->fields();
for ( int idx = 0; idx < fields.count(); ++idx )
{
QgsAttributes newValues = feature.attributes();
QgsAttributeMap origValues = sLastUsedValues[ mLayer ];
if ( origValues[idx] != newValues.at( idx ) )
{
QgsDebugMsg( QString( "saving %1 for %2" ).arg( sLastUsedValues[ mLayer ][idx].toString() ).arg( idx ) );
sLastUsedValues[ mLayer ][idx] = newValues.at( idx );
}
}
}
}
bool QgsMapToolLabel::dataDefinedPosition( QgsVectorLayer* vlayer, const QgsFeatureId &featureId, double& x, bool& xSuccess, double& y, bool& ySuccess, int& xCol, int& yCol ) const
{
xSuccess = false;
ySuccess = false;
if ( !vlayer )
{
return false;
}
if ( mCurrentLabelPos.isDiagram )
{
if ( !diagramMoveable( vlayer, xCol, yCol ) )
{
return false;
}
}
else if ( !labelMoveable( vlayer, xCol, yCol ) )
{
return false;
}
QgsFeature f;
if ( !vlayer->getFeatures( QgsFeatureRequest().setFilterFid( featureId ).setFlags( QgsFeatureRequest::NoGeometry ) ).nextFeature( f ) )
{
return false;
}
const QgsAttributes& attributes = f.attributes();
x = attributes[xCol].toDouble( &xSuccess );
y = attributes[yCol].toDouble( &ySuccess );
return true;
}
void QgsVectorLayerFeatureIterator::useChangedAttributeFeature( QgsFeatureId fid, const QgsGeometry& geom, QgsFeature& f )
{
f.setFeatureId( fid );
f.setValid( true );
f.setFields( &L->mUpdatedFields );
if ( !( mRequest.flags() & QgsFeatureRequest::NoGeometry ) )
f.setGeometry( geom );
bool subsetAttrs = ( mRequest.flags() & QgsFeatureRequest::SubsetOfAttributes );
if ( !subsetAttrs || ( subsetAttrs && mRequest.subsetOfAttributes().count() > 0 ) )
{
// retrieve attributes from provider
QgsFeature tmp;
//mDataProvider->featureAtId( fid, tmp, false, mFetchProvAttributes );
QgsFeatureRequest request;
request.setFilterFid( fid ).setFlags( QgsFeatureRequest::NoGeometry ).setSubsetOfAttributes( mProviderRequest.subsetOfAttributes() );
QgsFeatureIterator fi = L->dataProvider()->getFeatures( request );
if ( fi.nextFeature( tmp ) )
{
updateChangedAttributes( tmp );
f.setAttributes( tmp.attributes() );
}
}
if ( !mFetchJoinInfo.isEmpty() )
addJoinedAttributes( f );
}
void QgsNetworkAnalysisAlgorithmBase::loadPoints( QgsFeatureSource *source, QVector< QgsPointXY > &points, QHash< int, QgsAttributes > &attributes, QgsProcessingContext &context, QgsProcessingFeedback *feedback )
{
feedback->pushInfo( QObject::tr( "Loading points…" ) );
QgsFeature feat;
int i = 0;
int pointId = 1;
double step = source->featureCount() > 0 ? 100.0 / source->featureCount() : 0;
QgsFeatureIterator features = source->getFeatures( QgsFeatureRequest().setDestinationCrs( mNetwork->sourceCrs(), context.transformContext() ) );
while ( features.nextFeature( feat ) )
{
i++;
if ( feedback->isCanceled() )
{
break;
}
feedback->setProgress( i * step );
if ( !feat.hasGeometry() )
continue;
QgsGeometry geom = feat.geometry();
QgsAbstractGeometry::vertex_iterator it = geom.vertices_begin();
while ( it != geom.vertices_end() )
{
points.push_back( QgsPointXY( *it ) );
attributes.insert( pointId, feat.attributes() );
it++;
pointId++;
}
}
}
void QgsVectorLayerJoinBuffer::cacheJoinLayer( QgsVectorJoinInfo& joinInfo )
{
//memory cache not required or already done
if ( !joinInfo.memoryCache || joinInfo.cachedAttributes.size() > 0 )
{
return;
}
QgsVectorLayer* cacheLayer = dynamic_cast<QgsVectorLayer*>( QgsMapLayerRegistry::instance()->mapLayer( joinInfo.joinLayerId ) );
if ( cacheLayer )
{
int joinFieldIndex;
if ( joinInfo.joinFieldName.isEmpty() )
joinFieldIndex = joinInfo.joinFieldIndex; //for compatibility with 1.x
else
joinFieldIndex = cacheLayer->pendingFields().indexFromName( joinInfo.joinFieldName );
if ( joinFieldIndex < 0 || joinFieldIndex >= cacheLayer->pendingFields().count() )
return;
joinInfo.cachedAttributes.clear();
QgsFeatureIterator fit = cacheLayer->getFeatures( QgsFeatureRequest().setFlags( QgsFeatureRequest::NoGeometry ) );
QgsFeature f;
while ( fit.nextFeature( f ) )
{
const QgsAttributes& attrs = f.attributes();
joinInfo.cachedAttributes.insert( attrs[joinFieldIndex].toString(), attrs );
}
}
}
QgsVectorLayer *QgsFeatureSource::materialize( const QgsFeatureRequest &request, QgsFeedback *feedback )
{
QgsWkbTypes::Type outWkbType = request.flags() & QgsFeatureRequest::NoGeometry ? QgsWkbTypes::NoGeometry : wkbType();
QgsCoordinateReferenceSystem crs = request.destinationCrs().isValid() ? request.destinationCrs() : sourceCrs();
QgsAttributeList requestedAttrs = request.subsetOfAttributes();
QgsFields outFields;
if ( request.flags() & QgsFeatureRequest::SubsetOfAttributes )
{
int i = 0;
const QgsFields sourceFields = fields();
for ( const QgsField &field : sourceFields )
{
if ( requestedAttrs.contains( i ) )
outFields.append( field );
i++;
}
}
else
{
outFields = fields();
}
std::unique_ptr< QgsVectorLayer > layer( QgsMemoryProviderUtils::createMemoryLayer(
sourceName(),
outFields,
outWkbType,
crs ) );
QgsFeature f;
QgsFeatureIterator it = getFeatures( request );
int fieldCount = fields().count();
while ( it.nextFeature( f ) )
{
if ( feedback && feedback->isCanceled() )
break;
if ( request.flags() & QgsFeatureRequest::SubsetOfAttributes )
{
// remove unused attributes
QgsAttributes attrs;
for ( int i = 0; i < fieldCount; ++i )
{
if ( requestedAttrs.contains( i ) )
{
attrs.append( f.attributes().at( i ) );
}
}
f.setAttributes( attrs );
}
layer->dataProvider()->addFeature( f, QgsFeatureSink::FastInsert );
}
return layer.release();
}
QString QgsPointDisplacementRenderer::getLabel( const QgsFeature& f )
{
QString attribute;
const QgsAttributes& attrs = f.attributes();
if ( mLabelIndex >= 0 && mLabelIndex < attrs.count() )
{
attribute = attrs[mLabelIndex].toString();
}
return attribute;
}
QSizeF QgsTextDiagram::diagramSize( const QgsFeature& feature, const QgsRenderContext& c, const QgsDiagramSettings& s, const QgsDiagramInterpolationSettings& is )
{
Q_UNUSED( c );
QVariant attrVal;
if ( is.classificationAttributeIsExpression )
{
QgsExpression* expression = getExpression( is.classificationAttributeExpression, feature.fields() );
attrVal = expression->evaluate( feature );
}
else
{
attrVal = feature.attributes()[is.classificationAttribute];
}
if ( !attrVal.isValid() )
{
return QSizeF(); //zero size if attribute is missing
}
double scaledValue = attrVal.toDouble();
double scaledLowerValue = is.lowerValue;
double scaledUpperValue = is.upperValue;
double scaledLowerSizeWidth = is.lowerSize.width();
double scaledLowerSizeHeight = is.lowerSize.height();
double scaledUpperSizeWidth = is.upperSize.width();
double scaledUpperSizeHeight = is.upperSize.height();
// interpolate the squared value if scale by area
if ( s.scaleByArea )
{
scaledValue = sqrt( scaledValue );
scaledLowerValue = sqrt( scaledLowerValue );
scaledUpperValue = sqrt( scaledUpperValue );
scaledLowerSizeWidth = sqrt( scaledLowerSizeWidth );
scaledLowerSizeHeight = sqrt( scaledLowerSizeHeight );
scaledUpperSizeWidth = sqrt( scaledUpperSizeWidth );
scaledUpperSizeHeight = sqrt( scaledUpperSizeHeight );
}
//interpolate size
double scaledRatio = ( scaledValue - scaledLowerValue ) / ( scaledUpperValue - scaledLowerValue );
QSizeF size = QSizeF( is.upperSize.width() * scaledRatio + is.lowerSize.width() * ( 1 - scaledRatio ),
is.upperSize.height() * scaledRatio + is.lowerSize.height() * ( 1 - scaledRatio ) );
// Scale, if extension is smaller than the specified minimum
if ( size.width() <= s.minimumSize && size.height() <= s.minimumSize )
{
size.scale( s.minimumSize, s.minimumSize, Qt::KeepAspectRatio );
}
return size;
}
void QgsOverlayAnalyzer::intersectFeature( QgsFeature& f, QgsVectorFileWriter* vfw,
QgsVectorLayer* vl, QgsSpatialIndex* index )
{
if ( !f.hasGeometry() )
{
return;
}
QgsGeometry featureGeometry = f.geometry();
QgsGeometry intersectGeometry;
QgsFeature overlayFeature;
QList<QgsFeatureId> intersects;
intersects = index->intersects( featureGeometry.boundingBox() );
QList<QgsFeatureId>::const_iterator it = intersects.constBegin();
QgsFeature outFeature;
for ( ; it != intersects.constEnd(); ++it )
{
if ( !vl->getFeatures( QgsFeatureRequest().setFilterFid( *it ) ).nextFeature( overlayFeature ) )
{
continue;
}
if ( featureGeometry.intersects( overlayFeature.geometry() ) )
{
intersectGeometry = featureGeometry.intersection( overlayFeature.geometry() );
outFeature.setGeometry( intersectGeometry );
QgsAttributes attributesA = f.attributes();
QgsAttributes attributesB = overlayFeature.attributes();
combineAttributeMaps( attributesA, attributesB );
outFeature.setAttributes( attributesA );
//add it to vector file writer
if ( vfw )
{
vfw->addFeature( outFeature );
}
}
}
}
void QgsFeaturePool::updateFeature( QgsFeature& feature )
{
QgsGeometryMap geometryMap;
geometryMap.insert( feature.id(), QgsGeometry( feature.geometry()->geometry()->clone() ) );
QgsChangedAttributesMap changedAttributesMap;
QgsAttributeMap attribMap;
for ( int i = 0, n = feature.attributes().size(); i < n; ++i )
{
attribMap.insert( i, feature.attributes().at( i ) );
}
changedAttributesMap.insert( feature.id(), attribMap );
mLayerMutex.lock();
mFeatureCache.remove( feature.id() ); // Remove to force reload on next get()
mLayer->dataProvider()->changeGeometryValues( geometryMap );
mLayer->dataProvider()->changeAttributeValues( changedAttributesMap );
mLayerMutex.unlock();
mIndexMutex.lock();
mIndex.deleteFeature( feature );
mIndex.insertFeature( feature );
mIndexMutex.unlock();
}
QVariant RgSpeedProperter::property( double distance, const QgsFeature& f ) const
{
QgsAttributes attrs = f.attributes();
if ( mAttributeId < 0 || mAttributeId >= attrs.count() )
return QVariant( distance / ( mDefaultValue*mToMetricFactor ) );
double val = distance / ( attrs.at( mAttributeId ).toDouble() * mToMetricFactor );
if ( val <= 0.0 )
return QVariant( distance / ( mDefaultValue / mToMetricFactor ) );
return QVariant( val );
}
void QgsGeometryAnalyzer::bufferFeature( QgsFeature& f, int nProcessedFeatures, QgsVectorFileWriter* vfw, bool dissolve,
QgsGeometry** dissolveGeometry, double bufferDistance, int bufferDistanceField )
{
double currentBufferDistance;
QgsGeometry* featureGeometry = f.geometry();
QgsGeometry* tmpGeometry = 0;
QgsGeometry* bufferGeometry = 0;
if ( !featureGeometry )
{
return;
}
//create buffer
if ( bufferDistanceField == -1 )
{
currentBufferDistance = bufferDistance;
}
else
{
currentBufferDistance = f.attribute( bufferDistanceField ).toDouble();
}
bufferGeometry = featureGeometry->buffer( currentBufferDistance, 5 );
if ( dissolve )
{
if ( nProcessedFeatures == 0 )
{
*dissolveGeometry = bufferGeometry;
}
else
{
tmpGeometry = *dissolveGeometry;
*dissolveGeometry = ( *dissolveGeometry )->combine( bufferGeometry );
delete tmpGeometry;
delete bufferGeometry;
}
}
else //dissolve
{
QgsFeature newFeature;
newFeature.setGeometry( bufferGeometry );
newFeature.setAttributes( f.attributes() );
//add it to vector file writer
if ( vfw )
{
vfw->addFeature( newFeature );
}
}
}
QVariant QgsMergeAttributesDialog::featureAttribute( QgsFeatureId featureId, int fieldIdx )
{
int i;
for ( i = 0; i < mFeatureList.size() && mFeatureList.at( i ).id() != featureId; i++ )
;
if ( i < mFeatureList.size() )
{
const QgsFeature f = mFeatureList.at( i );
return f.attributes().at( fieldIdx );
}
return QVariant( mVectorLayer->fields().at( fieldIdx ).type() );
}
QgsFeatureList QgsMinimumEnclosingCircleAlgorithm::processFeature( const QgsFeature &feature, QgsProcessingContext &, QgsProcessingFeedback * )
{
QgsFeature f = feature;
if ( f.hasGeometry() )
{
double radius = 0;
QgsPointXY center;
QgsGeometry outputGeometry = f.geometry().minimalEnclosingCircle( center, radius, mSegments );
f.setGeometry( outputGeometry );
QgsAttributes attrs = f.attributes();
attrs << radius
<< M_PI *radius *radius;
f.setAttributes( attrs );
}
else
{
QgsAttributes attrs = f.attributes();
attrs << QVariant()
<< QVariant();
f.setAttributes( attrs );
}
return QgsFeatureList() << f;
}
bool QgsVectorLayerEditBuffer::addFeature( QgsFeature& f )
{
if ( !( L->dataProvider()->capabilities() & QgsVectorDataProvider::AddFeatures ) )
{
return false;
}
if ( L->mUpdatedFields.count() != f.attributes().count() )
return false;
// TODO: check correct geometry type
L->undoStack()->push( new QgsVectorLayerUndoCommandAddFeature( this, f ) );
return true;
}
QVariant QgsGraduatedSymbolRenderer::valueForFeature( QgsFeature &feature, QgsRenderContext &context ) const
{
QgsAttributes attrs = feature.attributes();
QVariant value;
if ( mAttrNum < 0 || mAttrNum >= attrs.count() )
{
value = mExpression->evaluate( &context.expressionContext() );
}
else
{
value = attrs.at( mAttrNum );
}
return value;
}
void QgsOverlayAnalyzer::intersectFeature( QgsFeature &f, QgsVectorFileWriter *vfw,
QgsVectorLayer *vl, QgsSpatialIndex *index )
{
if ( !f.hasGeometry() )
{
return;
}
QgsGeometry featureGeometry = f.geometry();
QgsGeometry intersectGeometry;
QgsFeature overlayFeature;
QList<QgsFeatureId> intersects = index->intersects( featureGeometry.boundingBox() );
QgsFeatureRequest req = QgsFeatureRequest().setFilterFids( intersects.toSet() );
QgsFeatureIterator intersectIt = vl->getFeatures( req );
QgsFeature outFeature;
while ( intersectIt.nextFeature( overlayFeature ) )
{
if ( featureGeometry.intersects( overlayFeature.geometry() ) )
{
intersectGeometry = featureGeometry.intersection( overlayFeature.geometry() );
outFeature.setGeometry( intersectGeometry );
QgsAttributes attributesA = f.attributes();
QgsAttributes attributesB = overlayFeature.attributes();
combineAttributeMaps( attributesA, attributesB );
outFeature.setAttributes( attributesA );
//add it to vector file writer
if ( vfw )
{
vfw->addFeature( outFeature );
}
}
}
}
void QgsVectorLayerFeatureIterator::useAddedFeature( const QgsFeature& src, QgsFeature& f )
{
f.setFeatureId( src.id() );
f.setValid( true );
f.setFields( &L->mUpdatedFields );
if ( src.geometry() && !( mRequest.flags() & QgsFeatureRequest::NoGeometry ) )
f.setGeometry( *src.geometry() );
// TODO[MD]: if subset set just some attributes
f.setAttributes( src.attributes() );
if ( !mFetchJoinInfo.isEmpty() )
addJoinedAttributes( f );
}
bool QgsVectorLayerEditBuffer::addFeature( QgsFeature& f )
{
if ( !( L->dataProvider()->capabilities() & QgsVectorDataProvider::AddFeatures ) )
{
return false;
}
int layerFieldCount = L->dataProvider()->fields().count() + mAddedAttributes.count() - mDeletedAttributeIds.count();
if ( layerFieldCount != f.attributes().count() )
return false;
// TODO: check correct geometry type
L->undoStack()->push( new QgsVectorLayerUndoCommandAddFeature( this, f ) );
return true;
}
QSizeF QgsHistogramDiagram::diagramSize( const QgsFeature& feature, const QgsRenderContext& c, const QgsDiagramSettings& s, const QgsDiagramInterpolationSettings& is )
{
QSizeF size;
if ( feature.attributes().isEmpty() )
{
return size; //zero size if no attributes
}
if ( qgsDoubleNear( is.upperValue, is.lowerValue ) )
return size; // invalid value range => zero size
double maxValue = 0;
QgsExpressionContext expressionContext = c.expressionContext();
expressionContext.setFeature( feature );
if ( !feature.fields().isEmpty() )
expressionContext.setFields( feature.fields() );
Q_FOREACH ( const QString& cat, s.categoryAttributes )
{
QgsExpression* expression = getExpression( cat, expressionContext );
maxValue = qMax( expression->evaluate( &expressionContext ).toDouble(), maxValue );
}
// Scale, if extension is smaller than the specified minimum
if ( maxValue < s.minimumSize )
{
maxValue = s.minimumSize;
}
switch ( s.diagramOrientation )
{
case QgsDiagramSettings::Up:
case QgsDiagramSettings::Down:
mScaleFactor = (( is.upperSize.width() - is.lowerSize.height() ) / ( is.upperValue - is.lowerValue ) );
size.scale( s.barWidth * s.categoryAttributes.size(), maxValue * mScaleFactor, Qt::IgnoreAspectRatio );
break;
case QgsDiagramSettings::Right:
case QgsDiagramSettings::Left:
mScaleFactor = (( is.upperSize.width() - is.lowerSize.width() ) / ( is.upperValue - is.lowerValue ) );
size.scale( maxValue * mScaleFactor, s.barWidth * s.categoryAttributes.size(), Qt::IgnoreAspectRatio );
break;
}
return size;
}
void QgsVectorLayerFeatureIterator::FetchJoinInfo::addJoinedAttributesDirect( QgsFeature& f, const QVariant& joinValue ) const
{
// no memory cache, query the joined values by setting substring
QString subsetString = joinLayer->dataProvider()->subsetString(); // provider might already have a subset string
QString bkSubsetString = subsetString;
if ( !subsetString.isEmpty() )
{
subsetString.append( " AND " );
}
QString joinFieldName;
if ( joinInfo->joinFieldName.isEmpty() && joinInfo->joinFieldIndex >= 0 && joinInfo->joinFieldIndex < joinLayer->pendingFields().count() )
joinFieldName = joinLayer->pendingFields().field( joinInfo->joinFieldIndex ).name(); // for compatibility with 1.x
else
joinFieldName = joinInfo->joinFieldName;
subsetString.append( "\"" + joinFieldName + "\"" + " = " + "\"" + joinValue.toString() + "\"" );
joinLayer->dataProvider()->setSubsetString( subsetString, false );
// select (no geometry)
QgsFeatureRequest request;
request.setFlags( QgsFeatureRequest::NoGeometry );
request.setSubsetOfAttributes( attributes );
QgsFeatureIterator fi = joinLayer->getFeatures( request );
// get first feature
QgsFeature fet;
if ( fi.nextFeature( fet ) )
{
int index = indexOffset;
const QgsAttributes& attr = fet.attributes();
for ( int i = 0; i < attr.count(); ++i )
{
if ( i == joinField )
continue;
f.setAttribute( index++, attr[i] );
}
}
else
{
// no suitable join feature found, keeping empty (null) attributes
}
joinLayer->dataProvider()->setSubsetString( bkSubsetString, false );
}
void QgsFeatureAction::updateLastUsedValues( const QgsFeature& feature )
{
QgsAttributeForm* form = qobject_cast<QgsAttributeForm*>( sender() );
Q_ASSERT( form );
QgsFields fields = mLayer->pendingFields();
for ( int idx = 0; idx < fields.count(); ++idx )
{
const QgsAttributes &newValues = feature.attributes();
QgsAttributeMap origValues = sLastUsedValues[ mLayer ];
if ( origValues[idx] != newValues[idx] )
{
QgsDebugMsg( QString( "saving %1 for %2" ).arg( sLastUsedValues[ mLayer ][idx].toString() ).arg( idx ) );
sLastUsedValues[ mLayer ][idx] = newValues[idx];
}
}
}
QVariant QgsCategorizedSymbolRendererV2::valueForFeature( QgsFeature& feature, QgsRenderContext &context ) const
{
QgsAttributes attrs = feature.attributes();
QVariant value;
if ( mAttrNum == -1 )
{
Q_ASSERT( mExpression.data() );
value = mExpression->evaluate( &context.expressionContext() );
}
else
{
value = attrs.value( mAttrNum );
}
return value;
}
bool QgsMapToolShowHideLabels::showHideLabel( QgsVectorLayer* vlayer,
int fid,
bool hide )
{
// verify attribute table has proper field setup
bool showSuccess;
int showCol;
int show;
if ( !dataDefinedShowHide( vlayer, fid, show, showSuccess, showCol ) )
{
return false;
}
// check if attribute value is already the same
QgsFeature f;
if ( !vlayer->getFeatures( QgsFeatureRequest().setFilterFid( fid ).setFlags( QgsFeatureRequest::NoGeometry ) ).nextFeature( f ) )
{
return false;
}
int colVal = hide ? 0 : 1;
QVariant fQVal = f.attributes()[showCol];
bool convToInt;
int fVal = fQVal.toInt( &convToInt );
if ( !convToInt || fVal == colVal )
{
return false;
}
// different attribute value, edit table
QString labelText = currentLabelText( 24 );
QString editTxt = hide ? tr( "Hid label" ) : tr( "Showed label" );
vlayer->beginEditCommand( editTxt + QString( " '%1'" ).arg( labelText ) );
if ( !vlayer->changeAttributeValue( fid, showCol, colVal, true ) )
{
QgsDebugMsg( "Failed write to attribute table" );
vlayer->endEditCommand();
return false;
}
vlayer->endEditCommand();
return true;
}
